package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;


import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 分页查询
     * 套餐表和分类表联查
     * @param setmealPageQueryDTO
     * @return
     */
    public PageResult page(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
       Page<SetmealVO> page= setmealMapper.pageQuery(setmealPageQueryDTO);
       return new PageResult(page.getTotal(),page.getResult());
    }





    /**
     * 新建套餐
     * @param setmealDTO
     */
    @Transactional
    public void save(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmeal.setStatus(0);
        setmealMapper.insert(setmeal);
        Long id = setmeal.getId();

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        for (SetmealDish setmealDish : setmealDishes) {
            setmealDish.setSetmealId(id);
        }
        setmealDishMapper.insert(setmealDishes);

    }

    /**
     * 根据ID查询套餐
     * 1.先查套餐表
     * 2.在查套餐和菜品连表
     * 封装进VO返回
     * @param id
     * @return
     */
    public SetmealVO queryById(Long id) {
       Setmeal setmeal= setmealMapper.quereyById(id);

      List<SetmealDish> list = setmealDishMapper.queryById(id);

        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(list);
        return setmealVO;
    }

    /**
     * 修改套餐
     * @param setmealDTO
     */
    @Transactional
    public void updateById(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.updateById(setmeal);
        //删除原有关系
        setmealDishMapper.delete(setmealDTO.getId());
        //插入新关系
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishMapper.insert(setmealDishes);
    }

    /**
     * 根据Id删除套餐/批量
     * @param ids
     */
    public void delete(List<Long> ids) {
        for (Long id : ids) {
            Setmeal setmeal = setmealMapper.quereyById(id);
            if (setmeal.getStatus()== StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
            setmealMapper.deleteById(id);
            setmealDishMapper.delete(id);
        }

    }

    @Override
    public void chageStatus(Integer status ,Long id) {
        setmealMapper.chageStatus(status,id);
    }


    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
